EP 0688078 B1 19981028 - Busbar protection method and device
Title (en)
Busbar protection method and device
Title (de)
Verfahren und Vorrichtung zum Schutz von Sammelschienen
Title (fr)
Procédé et dispositif de protection des barres collectrices
Publication
Application
Priority
DE 4420513 A 19940613
Abstract (en)
[origin: US5619392A] In a busbar protection method and a corresponding device, the maximum values of the currents in the outgoers are determined. The maximum values Ikmax of the current characteristics are extended by a certain hold time th. Subsequently, these current characteristics are processed further vectorially. With the aid of these current characteristics +E,uns Ik+EE changed in such a way, a fault signal is calculated by means of a protection algorithm, preferably the current comparison method with current stabilization or the phase comparison algorithm. It can be uniquely determined on the basis of the extension of the maximum according to the invention whether an external fault or an internal one is concerned. The advantage of the method and of the device according to the invention resides, in particular, in that the localization of the fault is possible in a reliable fashion even in the case of strong saturation of the current transformers. Above all, false tripping can be reliably avoided even in the case of external faults.
IPC 1-7
IPC 8 full level
G01R 31/02 (2006.01); H02B 13/065 (2006.01); H02G 5/06 (2006.01); H02H 1/04 (2006.01); H02H 7/26 (2006.01)
CPC (source: EP US)
H02B 13/065 (2013.01 - EP US); H02H 1/046 (2013.01 - EP US); H02H 7/261 (2013.01 - EP US)
Designated contracting state (EPC)
AT CH DE FR GB LI SE
DOCDB simple family (publication)
US 5619392 A 19970408; AT E172821 T1 19981115; CA 2147231 A1 19951214; CA 2147231 C 20060307; DE 4420513 A1 19951214; DE 59504038 D1 19981203; EP 0688078 A2 19951220; EP 0688078 A3 19970312; EP 0688078 B1 19981028; JP 3811510 B2 20060823; JP H085696 A 19960112
DOCDB simple family (application)
US 42758895 A 19950424; AT 95201441 T 19950601; CA 2147231 A 19950418; DE 4420513 A 19940613; DE 59504038 T 19950601; EP 95201441 A 19950601; JP 14428595 A 19950612